Vat Yellow 4

Also known as: C.I. Vat Yellow 4, C.I. 59100, Dibenzo[b,def]chrysene-7,14-dione, Dibenzo[b,i]pyrene-7,14-quinone, Dibenzopyrenequinone, Dibenzochrysenedione, Golden Yellow ZhKh, Tinon Golden Yellow, Tyrion Yellow, Vat Golden Yellow, Yellow GK base, Vat Yellow ZhKh, Helanthrene Yellow

Vat Yellow 4 (CAS 128-66-5) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C24H12O2 and a molecular weight of 332.35100 g/mol. Key properties include a boiling point of 606.7ºC at 760 mmHg, a density of 1.418 g/cm3 and a flash point of 219.9ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 128-66-5
Jingsj CID: J-1990992-3
Molecular Formula: C₂₄H₁₂O₂
Molecular Weight: 332.35100 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	606.7ºC at 760 mmHg
Density	1.418 g/cm3
Flash Point	219.9ºC
Exact Mass	332.08400
PSA	34.14000
LogP	5.26260
Vapor Pressure	1.15E-14mmHg at 25°C
Refractive Index	1.792

Activity & Biological Data

Additional Information	[1]. Chinenye Adaobi Igwegbe, et al. Equilibrium and Kinetics Analysis on Vat Yellow 4 Uptake from Aqueous Environment by Modified Rubber Seed Shells: Nonlinear modelling. J. Mater. Environ. Sci., 2020, 11(9): 1424-1444.

Customs & Trade Information

HS Code	2914399090
Summary	2914399090. other aromatic ketones without other oxygen function. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:5.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of Vat Yellow 4?

The CAS number of Vat Yellow 4 is 128-66-5.

What are the molecular formula and molecular weight of Vat Yellow 4?

Vat Yellow 4 has molecular formula C24H12O2 and molecular weight 332.35100 g/mol.

What are the upstream and downstream products of Vat Yellow 4?

For Vat Yellow 4, Upstream Products: 1,5-dibenzoylnaphthalene, 2-Formylphenylboronic acid, Benzanthrone; Downstream Products: Dibenzochrysene.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Vat Yellow 4 (CAS 128-66-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1990992-3 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.